Date: Mon, 2 Jul 2018 14:58:30 +0000 From: Wis Macomson <Wis@teraspeed.com> To: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: RPI3B+ does not reboot Message-ID: <BY2PR16MB0149B3B639A5664E8CAF1870BD430@BY2PR16MB0149.namprd16.prod.outlook.com>
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Can you disconnect the serial TX data (data to the RPi) and try the reboots= ? It may be that this signal is partially powering the processor through the = input ESD protection diode, leading to very awkward internal states. This h= as been observed on the Rock64 (RK3328 SoC) and Rockpro64 (RK3399). If you can just break the TX connection, you'll be able to see the boot mes= sages. -wis Wis Macomson, Signal Integrity Engineer Oregon, Teraspeed Home Office Office: 541-393-8023=20 www.samtec.com =20
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